Door handling gear for use with horizontal coking chamber ovens



Sept. 24, 1957 2,807,372

DOOR HANDLING GEAR FOR USE WITH HORIZONTAL coxmc CHAMER OVENS Filed April 28, 1954 G. HENSELEIT 2 Sheets-Sheet 1 IN VE/V T02, 6505!; 172N551. srr

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a rroe/vcy" DOOR HANDLING GEAR FOR USE WITH HORIZONTAL coxmc CHAMBER OVENS Filed April 28, 1954 Sept. 24, 1957 ENsEL l-r 2 Sheets-Sheet 2 DOOR HANDLING GEAR FOR USE WITH HORI- ZONTAL COKING CHAMBER OVENS Georg Henseleit, Essen, Germany, assignor, by mesne assignments, to Koppers Company, Inc., Pittsburgh, Pa., a corporation of Delaware Application April 28, 1954, Serial No. 426,244

3 Claims. (Cl. 212-4) The present invention relates to door handling gear for lifting the doors of horizontal coking chamber ovens of the type having a lever system to engage the door, clear it from its door seat, withdraw it, and move it aside.

Door handling gear of this character, which are sometimes used also for unlatching and latching the latch bars for the doors, are driven in front of the oven battery and, as a result of wear on the rails of their trackway, or sinking of the ground, frequently are found to be in an uneven inclined condition, this resulting in turn in a canted disposition of the upright door carrier on which the lever system for handling the door is mounted. The result is that where the door is engaged by two intercoupled levers, as is most usual or common at the present time, either the upper or the lower arm of the door carrier then engages the door before the other arm, so that occasionally one of the two lever arms cannot engage the door at all. If for example the: door is engaged by an upper lever arm and supported at the lower part by a bearer arm, should the upright door carrier be inclined or canted, on withdrawal the engaged doorand the delicate sealing means thereon may be damaged at the corners of the door.

The door lifting arms have door grasping claws for engaging door lifting hooks on the door, and it has been known for the two door grasping claws to be 'made' ad justable to enable them to be restored into a position which enables them properly to grasp a vertically-disposed door should the door carrier itself be inclined or canted;

If however latch operating mechanisms, intended for unlatching and latching the upper latches of the door, are also arranged on the door carrier, the troublesome drawback arises that, even if the claw of one of the door grasping lever arms is adjusted, it is impossible for both of the latch operating mechanisms to engage the respective door latches.

It is an object of the present invention so to construct and arrange the upright door carrier on which the lever system for lifting and handling the door is mounted, that should the door operating mechanism assume an inclined or canted position, the door carrier can be restored into a strictly vertical position.

In pursuance of this object,- in accordance with the present invention the door carrier is suspended at its upper end in a supporting frame of the door handling gear so as to be universally rockable in this frame, and is adjustably mounted at its lower end in guides on the door handling gear for use, axially and transversely in relation to the oven chamber.

These guides are preferably constructed as slideways and with spindles which permit ready adjustment thereof.

In accordance with a further feature of the invention, where the door carrier is rotatable to enable the door after withdrawal from the oven chamber to be pivoted aside about the vertical axis of the carrier, the latter is suspended at its upper end, and supported at its lower end, in each case in a rocking ball, or roller bearing, race. This arrangement of the two upper and lower ball nited States. Patent 2 races of the door carrier permits a rocking adjustment of the door carrier without interference with the rotation of this carrier aside.

Where the. door carrier is coupled above the upper suspension ball or roller bearing to a drive shaft for imparting the rotation to one side of the carrier, the invention provides in addition a coupling between this'drive shaft and the door carrier comprises an elastic coupling to permit a universal rocking displacement of the carrier.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which:

Figure 1 is a side view of the door handling gear in association with one end of an oven chamber having a door mounted therein, this end and door being depicted in section; I

Figure 2 illustrates, on a larger scale, the rockable suspension and support of the upright door carrier of the gear.

The door 2 which is used to close the end of the oven chamber 1 has, at eachof its upper and lower parts, a door lifting hook 3 in which the lever arms, 4 and 5 of the door carrier 6 grasps when the door is to be raised. The lever arms 4 and 5 are mounted to rock in a vertical plane on the upright door carrier 6 and are connected together by means of a coupling rod 8for movement of the two lever arm-s 4 and 5 in unison. The coupling rod 8 is in two parts connected together by tightening knuckle 9, whereby the distance between the two lever arms 4 and 5 can be accurately set to ensure proper grasping engagement of both in the door hooks or pockets 3.

The lower door lifting claw 10 on the lower lifting arm 5 is adjustable on its arm 5 so as to be displaceable axially in relation to the oven chamber 1. This provides a further means of ensuring an accurate engagement of the claws of both lever arms 4 and 5 in the vertical plane.

The lifting of the door to unseat it before it is with drawn from the oven chamber 1 is carried out by a crank wheel 11 which operates the arms 5 and 6 through a chain and gearing on a worm and wormwheel gear 13 and the rod system 14 connected to the extension 15 of the upper lever arm 4, the arm 4 moving the arm 5 in unison through links 8 and 9. The necessary thrust for this may, however, be imparted pneumatically or hydraulically by means of a motor 16, details of which have not been illustrated since the detail is not essential to an understanding of the present invention.

The upright door carrier 6 is rotatably mounted in a travelling supporting frame 17. The travelling frame 17 has wheels 18 running on guide rails 19 and wheels 20 on guides 21 of the door handling gear to enable it to be displaced axially in relation to the oven chamber 1. The travelling frame 17 has a vertical stay 23 connected with a horizontal bottom stay 24. The horizontal bottom stay 24 is guided at the sides of the frame by shoes which ride in guides on a platform 25 of the carrier frame 22. This door carrier frame 22 is driven in the longitudinal direction of the oven battery on rails, not illustrated in the drawing, on either the coke pusher machine or to the coke guide car as conventional.

As is apparent from Figure 2, the door carrier 6 is suspended in a bearing 27 of the travelling frame 17 by means of a carrier ball race 28 which has a shaft 29 passing therethrough, this shaft having a collar 30 at its lower part which supports a bearing 31 rigidly connected to the upright carrier 6. Below the carrier ball race 28 the shaft passes through a rocking roller bearing 32, and mounted on the upper part of the carrier ball bearing race 28 is a ring 33 which is bevelled conically narrowing outwards. A thrust ring 34, which is screwed to the shaft 29, is inter-fittingly mounted on the ring 33. A clearance of afew millimetres is provided between the outer annular surface of the thrust ring 34 and the inner diameter of the bearing 27 to allow a substantial rocking outwards of the door carrier 6 about the pivotal centre 35 of the rocking roller bearing 32. For this reason an appropriate clearance is also provided between the outer annular surface of the shaft 29 and the inner annular surface of a washer 36 which closes the lower side of the rocking roller bearing 32.

Above the top opening of the bearing 27, the shaft 29 is provided with a flexible coupling 37, which is constructed in a conventional way to permit both an outward rocking of the shaft 29 and also breakage of the coupling in the event of an overload. In the interests of simplicity the further connection of this drive shaft to the operating motor through gearing has not been illustrated in the drawing.

At its lower part the door carrier 6 is connected with a shaft 38 arranged in a bearing 39. The shaft 38 is mounted in a rocking roller bearing 40 on the horizontal stay 24 of the travelling frame 17. A slide or carriage 44 with a lower part of dovetail form is mounted in the horizontal stay 24, this dovetail being engaged in a correspondingly-formed slideway 42 on the stay 24, and the slide 44 being adapted for displacement transversely in relation to the axis of oven chamber 1. Such transverse displacement is performed by a spindle shaft 43 which passes through the slide or carriage 44 and is mounted in the stay 24..

The slideway 42 is mounted on a fixed table 45 so as to be displaceable axially of the oven chamber. Such axial displacement can be effected by a spindle shaft. 46 which passes through the lower part of the slideway 42 and is mounted on the stay 24.

Hence, if in the course of time, the door handling gear and thus also the upright door carrier 6, become canted, thereis not only a danger that thelifting claws 10 of M the arms 4 and willnot both properly engage in the pockets 3 of the door, but also that the latch operating mechanisms 47 will not engage the respective pins 48 of the latches 49. In order to deal with this shortcoming, the door carrier 6 is restored to an exactly vertical positionin that, depending on the actual inclination to be dealt with, either the spindle 43 or the spindle 46, or both, are appropriately rotated. As a result the door carrier 6 is pivoted in the upper rocking roller bearing 32 and the lower such bearing 40, without interfering in any way with the rotation of the vertical door carrier 6 when this is required for pivoting the door after it has been withdrawn from the oven chamber. As a result the door will also be maintained in a strictly vertical position so that it can be freely withdrawn from the oven chamber without damage to the delicate sealing means thereof and can be similarly reinserted therein.

As will be understood, other types of ball or roller elements can be provided in place of those shown for the rocking roller bearings 32 and 40.

What I claim is:

1. Door handling gear for use with coking chambers comprising: an upright door carrier having a movable lever system by means of which the door can be grasped and lifted; a travelling frame for the door carrier by which the door may be withdrawn from an oven chamber when on the lever system; said carrier being pivotally suspended on a vertical axis at its upper end for rotation aside about the vertical axis by a universally rockable vertical bearing in the traveling frame; a lower vertical pivot and a rockable vertical bearing for the door carrier, said latter bearing being supported in guides mounted on the traveling frame; one of said guides being adjustable on the frame for axial movement, and the other being adjustable on the frame for transverse movement thereon in relation to an oven chamber for the door.

2. Door handling gear according to claim 1, and further characterized by the rocking bearings by which the door carrier is suspended at its upper end, and by which it is pivoted at its lower end, each comprises a roller bearing race.

3. Door handling gear according to claim 1, and further characterized by a flexible coupling driving connection mounted above the upper rocking bearing for the door carrier in driving relation with the vertical axis to pivotally rotate the same while the carrier rocks laterally as may be required.

References Cited in the file of this patent UNITED STATES PATENTS 2,588,060 Tweit Mar. 4, i952 

